Note: Henderson Sprint, Duo or
Marathon garage door operators sold
in the UK between 1987 and 2005 were manufactured by Sommer

Henderson/Sommer Marathon, Sprint & Duo operators
produced before July 2001 and Aperto units produced before March 2002 use
40.685Mhz transmitters. 40.685Mhz operators have an external aerial wire which
is approx 2Mtrs long. Henderson/Sommer garage door operators
produced after these dates use
868Mhz keyfob transmitters, 868Mhz motor units have a short aerial wire
which is approx 30cms long.

It is essential that you order the same
frequency as your original

Click image to enlargeSommer 4050 40.685Mhz
transmitter

Sommer 40.685Mhz keyfob
transmitter(for use with early Henderson or Sommer Marathon, Sprint, Duo &
Aperto operators to provide individual control of up to two doors)
dimensions: 60mm x 45mm x 17mm - Sommer Part No: 4050
(also known as: T397-40, TX02-40-2 and 4050V000)programming instructions
and
12 Volt LR23A battery included

Sommer 4026 mini
two channel 868Mhz transmittercan provide individual control of up to two doors
dimensions: 89mm x 24mm x 14mm
Sommer Part No: 4026programming instructions and one CR2032 battery included

Sommer 4020 'lighter style'
868Mhz transmittercan provide individual control of up to four doors.
stainless cover slides over buttons to hide them
dimensions: 89mm x 24mm x 14mm
Sommer Part No: 4020
(also known as:TX03-868-4 and 4020V000)programming instructions and one CR2032 battery included

CompatibilityEach remote control system manufacturer uses a unique security code protocol,
therefore the above transmitters can only be used with the specific make & model
of equipment for which they were intended and will not be compatible with any
other make of remote control system even if the radio frequency is the same

we do not supply any other spares for Henderson or Sommer door operators

PLEASE NOTE:
High value orders may be despatched by Royal Mail recorded delivery,
if you are not at home to sign for the goods when your postman calls
please provide an alternative address on our on-line order checkout page

option for orders
over £50

Same day despatch on orders submitted by 3pm
Next-day delivery also available*(*on orders placed Mon to Thurs only)